The report blames this on personal computers which have been compromised by malicious software, thus becoming a part of a "botnet" used to send spam.
These "zombified" computers account for 83.4% of all 107 billion spam messages sent each day. The cutwail botnet alone sent 8.5 trillion messages between April and November.
This post has been edited by Amazing Andrew: 08 December 2009 - 02:00 PM

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